45 lines
1.0 KiB
Markdown
45 lines
1.0 KiB
Markdown
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---
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title: "Detect Musl"
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date: 2022-07-31T16:00:15+03:00
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draft: false
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tags: [linux, c, shell, musl]
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---
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Пост — чистейшая копипаста с [SoF](https://stackoverflow.com/questions/58177815/how-to-actually-detect-musl-libc).
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```sh
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#! /bin/sh
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tmpf=/tmp/musl.log
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# Detect Musl C library.
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libc=$(ldd /bin/ls | grep 'musl' | head -1 | cut -d ' ' -f1)
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if [ -z $libc ]; then
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# This is not Musl.
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rm -f ${tmpf}
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exit 1
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fi
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$libc >${tmpf} 2>&1
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vstr=$(cat ${tmpf} | grep "Version" | cut -d ' ' -f2)
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v_major=$(echo $vstr | cut -d '.' -f1)
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v_minor=$(echo $vstr | cut -d '.' -f2)
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v_patch=$(echo $vstr | cut -d '.' -f3)
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rm -f ${tmpf}
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echo "-D__MUSL__ -D__MUSL_VER_MAJOR__=${v_major} -D__MUSL_VER_MINOR__=${v_minor} -D__MUSL_VER_PATCH__=${v_patch}"
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```
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```sh
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$ ./detect-musl.sh
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-D__MUSL__ -D__MUSL_VER_MAJOR__=1 -D__MUSL_VER_MINOR__=1 -D__MUSL_VER_PATCH__=24
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```
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```sh
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$ /lib/ld-musl-x86_64.so.1
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musl libc (x86_64)
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Version 1.2.3
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Dynamic Program Loader
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Usage: /lib/ld-musl-x86_64.so.1 [options] [--] pathname [args]
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```
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